Siemens Aktiengesellschaft

Siemens Aktiengesell Schaft

Peter Kaluza

Dirk Hertz

Marco Dornauer

Heinz Mitlehner

Reinhard Maier

Wolfgang Feil

Klaus Behringer

Christian Schreckinger

Matthias Meier

Gerhard Schr&ouml;ther

Hubert Schierling

Benno Weis

Diethard Runggaldier

Norbert Reichenbach

Annemarie Lehmeier

Josef Burger

Andreas Fritsch

Alexander Müller

Marcel Benecke

Alexander Kepka

Thomas Bär

A method is for connecting a capacitive load assembly to a DC grid. The load assembly is connectable to a supply potential of the DC grid by a control unit via a controllable switch element. The controllable switch element is periodically activated and deactivated by the control unit. The level of the current pulses flowing through the controllable switch element during the respective activation phase of the controllable switch element is detected by means of a current measuring device. The development of the level of at least two current pulses immediately following one another over time is evaluated by the control unit. The controllable switch element is additionally periodically activated and deactivated by the control unit if a specified change in the development of the level of the at least two current pulses immediately following one another over time is ascertained.

Method and device for connecting a capacitive load assembly to a DC grid

An overcurrent protection device is for protecting a load arranged in a DC grid. The load is coupled to a supply busbar, which is connectable to a supply potential of the DC grid, in the DC grid via the overcurrent protection device. The overcurrent protection device is designed to ascertain a current trigger value based upon a detected value of a current flowing through the overcurrent protection device and a trigger characteristic which is assigned to the load and is based on the current; compare the current trigger value with a threshold, and either trigger the overcurrent protection device or not, based upon the result of the comparison. The current is taken into consideration together with a first or a second factor in the trigger characteristic based upon the current direction.

Overcurrent protection device for protecting a consumer arranged in a DC grid

In a method for controlling a direct current switch having first and second semiconductor switches capable of being switched off, the first and second semiconductor switches are arranged between first and second terminals to enable conduction of a current with a first polarity through the first semiconductor switch and conduction of the current with a second polarity that is opposite to the first polarity through the second semiconductor switch. One of the first and second semiconductor switches is switched off as a function of a current measurement value.

Method for controlling a direct current switch, direct current switch, and DC voltage system

Semiconductor based motor control device

Motor starter

Control part of an electronic device

A switching device including a movable contact member. The movable contact member produces an isolating distance and includes an integral semiconductor switching element.

Switching device

The switching functions of switching a load on and off in normal operation and in fault operation are implemented in a simple manner in an electronic branch circuit switch, which is advantageously made with silicon carbide semiconductor switching elements and has a potential-free control device, a device for detection and immediate shutoff in the event of a short-circuit, and a protection device for detection and shutoff against overload currents, as well as an overvoltage limiting device.

Electronic branch switching device

Growing community of inventors

Rieden, Germany

Peter Kaluza